package com.example.myapplication2

import android.Manifest
import android.annotation.SuppressLint
import android.content.Intent
import android.content.pm.PackageManager
import android.net.Uri
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.provider.ContactsContract
import android.widget.ArrayAdapter
import android.widget.Toast
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import kotlinx.android.synthetic.main.activity_runtime_permission.*

class RuntimePermissionActivity : AppCompatActivity() {
    private val contactsList = ArrayList<String>()
    private lateinit var adapter: ArrayAdapter<String>
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_runtime_permission)
        makeCall.setOnClickListener {
            if (ContextCompat.checkSelfPermission(this,
                    Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(this,
                    arrayOf(Manifest.permission.CALL_PHONE), 1)
            } else {
                call()
            }
        }
        adapter = ArrayAdapter(this, android.R.layout.simple_list_item_1, contactsList)
        contactsView.adapter = adapter
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS)
            != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this,
                arrayOf(Manifest.permission.READ_CONTACTS), 1)
        } else {
            readContacts()
        }
    }
    override fun onRequestPermissionsResult(requestCode: Int,
                                            permissions: Array<String>, grantResults: IntArray) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        when (requestCode) {
            1 -> {
                if (grantResults.isNotEmpty() &&
                    grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    call()
                    readContacts()
                } else {
                    Toast.makeText(this, "You denied the permission",
                        Toast.LENGTH_SHORT).show()
                }
            }
        }
    }
    private fun call() {
        try {
            val intent = Intent(Intent.ACTION_CALL)
            intent.data = Uri.parse("tel:10086")
            startActivity(intent)
        } catch (e: SecurityException) {
            e.printStackTrace()
        }
    }
    @SuppressLint("Range")
    private fun readContacts() {
        // 查询联系人数据
        contentResolver.query(
            ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
            null, null, null, null)?.apply {
            while (moveToNext()) {
                // 获取联系人姓名
                val displayName = getString(getColumnIndex(
                    ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME))
                // 获取联系人手机号
                val number = getString(getColumnIndex(
                    ContactsContract.CommonDataKinds.Phone.NUMBER))
                contactsList.add("$displayName\n$number")
            }
            adapter.notifyDataSetChanged()
            close()
        }
    }
}